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Nanoimprinted Glass Substrates for Nanoscale Growth Control of Transparent Conducting Oxide Films

  • Yuki Sugimoto (a1), Yasuyuki Akita (a2), Yuta Nakasone (a3), Masahiro Mita (a4), Hideo Oi (a5) and Mamoru Yoshimoto (a6)...

Abstract

The crystal growth of indium tin oxide (ITO) thin films on nanoimprinted glass substrates was examined by applying pulsed laser deposition. The nanoimprinted glass was fabricated by thermal nanoimprint using a nanostriped NiO thin film mold. The nanopatterned glass had a straight nanowire array with intervals of about 180 nm, and wire height of about 30 nm. The surface morphology of the ITO thin film grown on the nanoimprinted glass accurately reflected the morphology of the glass surface nanopattern. The ITO thin film on the imprinted glass exhibited preferentially (111)-oriented polycrystalline growth, and had 35% lower resistivity in the direction perpendicular to the nanowire array than that of the film grown on the nonpatterned commercial glass.

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